I'm twitching, feeling weak at times, and my speech is clumsy and or slurred...I'm having trouble pronouncing certain words at certain times. I feel like I need to slow my speech so that I sung normal.

Can stress do this even after 2 months since the event that stated it all?

yes sure. please note anxious people often speak too fast, are prone to overall muscle tension including fascial muscles and are very very sensitive to their own performance. If you are not struggling daily and contunously in speaking in a normal volume of tone, if people do not ask regularly "what did you say?" etc., then it is just an anxiety.